Good Fruit Grower

May 15

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40 MAY 15, 2016 Good Fruit Grower T here is still much to be known about why cherries are so susceptible to powdery mil- dew — in ways that many other fruits are not — but researchers are narrowing the window of when cherries are most susceptible to the disease and determining just how many spores pose a problem at harvest. Mildew can affect both the leaves and the fruit on the same tree. Fungicides can adapt to deal with mildew on one or the other. A three-year project by Washington State University researchers centered on infection of the fruit itself. Dr. Claudia Probst, project lead and research associate at Washington State University's Irrigated Agricultural Research and Extension Center in Prosser, Washington, examined trees and fruit closely, starting at full bloom, to determine if the presence of fungus has any effect on the The problem of powdery mildew WSU researcher to study cherries' sudden transition from resistant to susceptible during the growing season. by Shannon Dininny Cherries Scientists aren't sure why powdery mildew infects cherries in the 360.333.4044 Casey Schoenberger Mount Vernon, WA Natural Fish Fertilizers for Organic Crop Production ORCHARDS VINEYARDS DRAMM Manitowoc, WI • U.S.A. FRUIT Extremely high levels of available Calcium & Phosphorus

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